Fun little physics playground. I'm not 100% sure of the objective and I kept launching myself outside of the level I think, but a physics-based platformer where you use bombs to propel yourself through the level is a really fun idea. A bit more refinement in terms of showing when the bombs are going to explode (like a little timer above them), toying with the physics a bit more, and maybe a bit more clarity around goals and objectives would give you a really strong prototype that you could easily iterate into a bigger game. Nicely done! Especially for your first time using Godot.